Air operated pump



y 1957 A. w. PHILLIPS EIAL 2,798,442

AIR OPERATED PUMP Filed Oct. 10, 1955 Asa W. Phi/lips John R Mar/an INVENTORS.

1 BY g ow i6. M154 United States Patent AIR OPERATED PUMP Asa W. Phillips, Melvindale, and John R. Morton, Detroit, Mich.

Application October 10, 1955, Serial No. 539,338

2 Claims. (Cl. 103-263) The present invention relates to new and useful improvements in pumps operated by air pressure.

An important object of the invention is to provide a pump which is devoid of moving parts and operated by air under pressure connected to an intake pipe to create suction for pulling fluid material into the pump and for dis charging the same therefrom.

Another object of the invention is to provide a pump operated by air suction means adapted for use in pumping either liquids or fluent solids and which also may be used as a suction cleaner or for the removal of surface water or liquid from floors.

A still further object is to provide a device of this character of simple and practical construction which is eflicient and reliable in operation, relatively inexpensive to manufacture and otherwise well adapted for the purpose for which the same is intended.

These, together with other objects and advantages which will become subsequently apparent, reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure 1 is a longitudinal sectional view;

Figure 2 is an enlarged transverse sectional view taken on a line 2-2 of Figure 1; and

Figure 3 is an enlarged transverse sectional view taken on the line 33 of Figure 1.

Referring now to the drawings in detail wherein, for the purpose of illustration, we have disclosed a preferred embodiment of the invention, the numeral 5 designates a cylindrical tank supported in an elevated horizontal position by front and rear legs 6 and 7.

A tube 8 is connected at one end to an internal nipple 9 at the center of the rear end 10 of the tank to support the tube in a longitudinally extending position therein and a tube extension 11 of increased diameter is connected to the inner end of tube 8 by a reducer 12. The free end of tube 11 terminates in spaced relation with respect to the adjacent end wall 13 of the tank 5 and is formed with a plurality of longitudinally extending slots 14 at the terminal portion of the tube extension 11. A circumferentially extending slot 15 is also formed in the top of the tube extension 11 at a point rearwardly with respect to the slots 14.

A T-fitting 16 is connected at one end to the internal nipple 9 by a nipple 17 and the outer end of fitting 16 is closed by a threaded plug 18 in which an air nozzle 19 is mounted and with the discharge end of the nozzle supported centrally in the fitting 16 and terminating at a point slightly inwardly of the center thereof. An intake nipple 20 extends downwardly from the fitting 16 and to which a hose (not shown) may be connected for leading to a supply of liquid, semi-liquid or granulated or other solid fragments.

A vent pipe 21 extends upwardly from the top portions of tank 5 adjacent the end thereof provided with the nozzle 19 and a butterfly valve 22 is mounted in the vent pipe. An outlet nipple 23 extends downwardly from the bottom portion of tank 5 substantially in the vertical plane of vent pipe 21. A discharge hose or conduit (not shown) 2,798,442 Patented July 9, 1957 "ice tube 8 and extension 11 into the tank 5 with the flow of air from the nozzle 19.

Air is vented out of the vent pipe 21 in the top of the tank and the material is discharge from the tank by way of the outlet nipple 23.

The circumferential slot 15 produces a fine spray of water transversely inside tank 5 to form a baffle to interrupt direct rearward travel of the water laden air to the vent 21 after leaving the front end of tube extension 11 and before the air and water separate. The delayed rearward travel'of the water-laden air gives the: water a chance to separate, thus permitting the air to pass to the vent, and the heavier water falls to the bottom of the tank and out of the discharge.

The longitudinal slots 14 in the front end of the tube extension 11 reduce pressure as the mixture of air and water enters the tank and also permits the tube extension to be flared if desired to further reduce pressure.

What is claimed as new is as follows:

1. A pump comprising a cylindrical horizontal tank having an outlet port at the lower portion and a vent pipe rising from the upper portion and adjacent one end of the tank, a butterfly valve in the vent pipe, a jet tube entering said one end of the tank and supported centrally therein and having an open inner end spaced inwardly from the other end of the tank and remote from the vent pipe, a nozzle entering the outer end of the tube for supplying air under pressure thereto, an inlet port for the tube and in the region of the inner end of the nozzle to draw fluid material into the tube by suction created by air discharged from the nozzle into the tube, said fluid material flowing from the inner end of the tube in a reverse direction in the tank toward the vent pipe, and an aperture in the upper portion of the tube at a point between the inner end thereof and the vent pipe to create a bafile of fluid in the tank to oppose direct flow of fluid therein from the open inner end of the tube to the vent pipe.

2. A pump comprising a cylindrical horizontal tank having an outlet port at the lower portion and a vent pipe rising from the upper portion and adjacent one end of the tank, a butterfly valve in the vent pipe, a jet tube eutering said one end of the tank and supported centrally therein and having an open inner end spaced inwardly from the other end of the tank and remote from the vent pipe, a nozzle entering the outer end of the tube for supplying air under pressure thereto, an inlet port for the tube and in the region of the inner end of the nozzle to draw fluid material into the tube by suction created by air discharged from the nozzle into the tube, said fluid material flowing from the inner end of the tube in a reverse direction in the tank toward the vent pipe, a longitudinal slot at the inner end of the tube to reduce pressure of fluid as it enters the tank, and a transverse slot in the upper portion of the tube at a point between the longitudinal slot and the vent pipe to discharge fluid radially in the tank to form a baflle of fluid opposing direct flow of fiuid from the open end of the tube to the vent pipe.

References Cited in the file of this patent UNITED STATES PATENTS 422,202 Furney Feb. 25, 1890 1,799,684 Gilbert Apr. 7, 1931 FOREIGN PATENTS 2,114 Great Britain of 1913 

